多间隙气体开关触发放电过程及击穿抖动  

Discharge process and closure jitter of six-stage gas switch under pulsed trigger

作　　者：丛培天[1] 邱爱慈[1] 孙铁平[1] 盛亮[1] 李阳[1] 张美[1] 

机构地区：[1]西北核技术研究所强脉冲辐射模拟与效应国家重点实验室,西安710024

出　　处：《强激光与粒子束》2013年第5期1303-1306,共4页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(50637010;11135007)

摘　　要：实验研究了开关闭合抖动随欠压比和脉冲触发电压的变化关系,利用紫外光纤探测器测量不同间隙放电时延,分析了放电过程对多间隙开关闭合抖动的影响,并研究采用预电离方法降低开关触发电压。实验表明:开关抖动随脉冲触发电压与欠压比的乘积增大呈指数下降趋势;当触发电压和欠压比的乘积大于33kV时,开关抖动小于5ns;乘积大于45kV时,开关抖动降到3ns以下并趋于饱和;对六间隙气体开关抖动的贡献,触发间隙占30%～40%,其余5个间隙为60%～70%;欠压比和触发电压对触发间隙击穿抖动的影响最大,对随后放电的3个间隙影响较小,对最后2个间隙几乎无影响;当欠压比大于57%时,采用预电离措施使开关的触发电压降低了10kV以上。Closure jitter versus voltage ratio and trigger voltage was experimentally measured for a six-stage gas switch. An ultra-violet fiber system was used to diagnose the discharge process influencing the closure jitter, and a pre-ionizing measure was employed to decrease the trigger voltage. It is found that the switch closure jitter declines exponentially with the product of trigger voltage and voltage ratio. The trigger gap accounts for 30%-40% of the closure jitter while the other five gaps account for 60%- 70%. The trigger voltage and voltage ratio have more influences on the jitter of the trigger gap which breaks down first, than on that of the three gaps discharging subsequently, and hardly affects the last two gaps. For the switch with a voltage ratio greater than 57%. the pre-ionizin measure finallv lowers the trier voltage bv over 10 kV.

关 键 词：气体开关 欠压比 闭合抖动 触发电压 光纤探测器 

分 类 号：TM836[电气工程—高电压与绝缘技术]